Variations of (para-)Hodge structures and their period maps in tt*-geometry. Schäfer, Lars — 2008 Beiträge zur Algebra und Geometrie
A geometric construction of (para)-pluriharmonic maps into G L ( 2 r ) / S P ( 2 r ) . Schäfer, Lars — 2008 Balkan Journal of Geometry and its Applications (BJGA)